DOA estimation for FOA

[sakshamsingh1]

Hi,

Thanks for the wonderful library.

I have a First Order Ambisonics (FOA) recording with a single static source. Can I use this library to estimate the direction of arrival (DOA), i.e. the azimuth and elevation angles of the sound source?

I am new to spatial audio, this might be a straightforward task, but I would greatly appreciate any guidance you can provide. A code snippet or a high-level explanation would be helpful.

Thanks,
Saksham

[chris-hld]

Hi Saksham!
Sorry for the late reply. Absolutely! There should be a few methods that would allow to design a DoA estimator from FOA.
A starting point could be MUSIC, implemented here: https://spaudiopy.readthedocs.io/en/latest/spaudiopy.parsa.html#spaudiopy.parsa.sh_music
The peaks are your DoA.
Another way would be to use the pseudo-intensity vector, e.g. https://spaudiopy.readthedocs.io/en/latest/spaudiopy.parsa.html#spaudiopy.parsa.pseudo_intensity
It may be beneficial to operate in time-frequency domain for that.
A DoA estimator is also implemented here:
https://github.com/chris-hld/hoac

Feel free to reach out for more information!